Technical Properties Properties of the Foam Component Properties ...

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DIN 53428. Zero. Coefficient of linear expansion. N/A. 70 x 10-6 K-1. Water Vapour Diffusion Resistivity (µ). DIN 52615. 110 – 225 µ. Water Vapour Permeability.
Technical Properties The major component of Marmox Multiboard is rigid extruded polystyrene foam with a closed cellular structure and a flame retardant additive. Marmox Multiboard has a 0.7mm polymer-concrete coating on both sides that is enhanced with strengthening carbon nano-fibres encasing a fiberglass mesh.

Properties of the Foam Component Property Density Thermal Conductivity (initial) Thermal Conductivity (>5yrs) Compressive Strength (10% deflection) Flexural Strength Water Absorption (2-day immersion) Water Absorption (Capillary) Coefficient of linear expansion Water Vapour Diffusion Resistivity (µ) Water Vapour Permeability ODP (Ozone Depleting Potential) GWP (Global Warming Potential)

Assessed to DIN 53420 DIN 52612 ASTM C518 DIN 53421 ASTM C203 ISO2896 DIN 53428 N/A DIN 52615 ASTM E-96 N/A N/A

Rating 3 36 ± 0.02 kg/m 0.027 Watt/mK 0.032 Watt/mK 2 Minimum of 0.25N/mm 0.30 ± 0.02 MPa 0.2% by volume Zero -6 -1 70 x 10 K 110 – 225 µ 0.028 ng/Pa.m.s Zero 5yrs) Compressive Strength (at 10% deflection) Bond Strength Maximum Tile Loading Weight Flexural Strength Water Vapour Permeability (Sd) Resistance to body Impact Bending Stiffness, EI (20mm / 30mm) Coefficient of linear expansion Fire Ignitability Fire Propagation Spread of Flame Flammability Impact Sound Reduction Shear Bond Strength Quality Management system O

Working temperature range: -50 to +80 C

Assessed to BS EN 13164 BS EN 826 BS EN 1384 CERAM121107 ASTM C203 DIN EN 12086 ETAG 003 EN 12089 N/A BS 476, part 5 BS 476, part 6 BS 476 part 7 EN13501 ISO140-8 EN 1448 ISO9001

Rating 0.033 - 0.036 Watt/mK 2 400kPa (40 Tonnes/m ) 2 0.3N/mm 2 62kg/m 2.05 ± 0.02 MPa 3.2m 3 x 120N/m 2 2 601KNmm / 1285 kN/mm -6 -1 30 x 10 K “P” not easily ignitable 8.1, “class O” 1, “class O” E dLW = 21 2 3.32kg/cm SGS/231739

Technical Properties continued Board Weights and Dimensions thickness 4mm 6mm 10mm 12.5mm 20mm 30mm 40mm 50mm 60mm  

Short Board: 600mm x 1250mm Board Weight (kg) 2.3 2.4 2.7 2.8 3.1 3.4 4.0 4.2 4.5

Short Board: 600mm x 1250mm Pack Weight (kg) 24 20 17 18 17 14 13 9 10

Long: 600mm x 2500mm Weight (kg) N/A N/A 5.3 5.5 6.1 6.7 8.0 8.4 8.9

Dimensional tolerances for standard boards: Thickness +/- 1mm, Width +/- 2mm, Length +/- 5mm The boards should be stored dry and flat. Slight bowing caused by incorrect storage or transport, for example, is not permanent and does not represent a technical defect. Slight curving can be rectified through storing the boards flat.

Thermal Specifications Board thickness (mm) 4 6 10 12.5 20 30 40 50 60



XPS thickness (m) 0.002 0.005 0.009 0.0115 0.019 0.029 0.039 0.049 0.059

Thermal resistance Rvalue (m.K/W) 0.06 0.16 0.28 0.36 0.59 0.91 1.22 1.53 1.84

Coefficient of Thermal Transmittance (W/m² x K) 4.20 2.96 2.08 1.86 1.30 0.92 0.72 0.58 0.50

The cementatious surface is resistant to heat and the chemicals within the sheathing around electric underfloor heating elements making it safe to use with these types of systems.

January 2013

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